I just purchased a new motherboard/processor. I brought over my old RAM, GPU, SSD/HDD/Case. I did a fresh install, formatted/installed Windows 7. I had a few programs causing BSOD's after about 30-45 minutes of a reboot/power on, that I was able to troubleshoot(Speccy + antivirus)
I cleared it up, no BSOD's after initial 5-10 hours of up time. I went to bed, I woke up, I saw that I was crashed. My computer would reset and then just hard lock up at loading screen. If I power cycle and turned back on, it boots up with no issues. I check the event log in Computer/Manage - it pointed to a ram issue. I took each stick and ran memplus86 on it for about 5-6 passes each, no errors. I purchased a single 4gb stick to test as well.
I tried leaving my CPU with just the new single stick, same thing, BSOD after about 24 hours.
I decided to come here, I have a new symptom now, though. I have a little bit of distorted sound for the split second of the sound starting. Example, the windows "ding" sound it makes or the bootup windows sound, it's distorted and static-y for the first half a second or so.
Also, when I was creating folders/renaming them on desktop for your SF_diag tool, I had to right click- refresh to see the changes.